1.approval:
1) admiration for someone
Examples:
　　　　　Oliver looked at Simon with approval.
　　　　　We all like others to show approval of what we do.
2) the act of approving
Examples:
　　　　　He expressed his approval of the arrangement.
　　　　　Dad indicated his approval with a nod of the head.

2.invincible: too strong to be overcome or defeated
Examples:
　　　　　Young athletes think of themselves to be invincible.
　　　　　That football team was once reputed to be invincible.

3.ease:
1) the ability to do something without difficulty
Examples:
　　　　　The wall is so low that they jump over it with ease.
　　　　　I was impressed by the ease with which the information would be retrieved.
2) the state of being comfortable and without worry and anxiety
Examples:
　　　　　The retired couple lives a life of ease.
　　　　　Let me put you at ease; we are all here as your friends, not to make life difficult for you.

4.relax: become less tense
Examples:
　　　　　The music will help to relax you.
　　　　　His face relaxed in a smile.

5.obstacle: something in the way that stops progress or makes it difficult
Examples:
　　　　　A tree fallen across the road was an obstacle to our car.
　　　　　Fear of change is an obstacle to progress.

6.communication: the act or action of communicating
Examples:
　　　　　Speech and writing are man’s most important methods of communication.
　　　　　Good communication is vital in a large organization.

7.break down: fail; (of machinery) fail to work
Examples:
　　　　　The peace talks have broken down.
　　　　　We are sorry to arrive late, but the car broke down.

8.short: suddenly
Examples:
　　　　　The rider pulled his horse up short.
　　　　　The driver stopped short when the child ran into the street.

9.pitch: (cause to) fall heavily or suddenly forwards or outwards
Examples:
　　　　　The man lost his balance and pitched down the cliff.
　　　　　His foot caught in a rock and he pitched forward.

10.result in: have as a result; cause
Examples:
　　　　　The accident resulted in the deaths of 2 passengers.
　　　　　His angry words resulted in a fight.

11.on one’s own: without help
Examples:
　　　　　I can’t carry it on my own; it is too heavy.
　　　　　Do you mean you’ve left her to do that on her own?

12.at the time: at the moment when something happened
Examples:
　　　　　He called at my office yesterday morning, but I could not see him, as I was having a meeting at the time.
　　　　　I told you at the time that you could do it.

13.despair:
(v.) lose hope of
Examples:
　　　　　Don’t despair: things will get better soon.
　　　　　During the war, the soldier despaired of ever coming home alive.
(n.) complete lack or loss of hope
Examples:
　　　　　Defeat after defeat filled us with despair.
　　　　　His despair of becoming a great artist made him stop painting.

14.give up: stop having or doing
Examples:
　　　　　She had to give up her attempt to swim across the Channel.
　　　　　John had given up attending the Board meeting.

15.undergo: experience (especially suffering or difficulty)
Examples:
　　　　　The explorers had to undergo much suffering.
　　　　　I hope I shall never again have to undergo such an unpleasant experience.

16.restore: bring back to a good or desirable state, especially of health
Examples:
　　　　　He feels completely restored to health after a period of intensive care.
　　　　　The doctor restored her power of speech.

17.emphasize: place special attention on
Examples:
　　　　　He emphasized the importance of being honest.
　　　　　The teacher emphasized the importance of care in crossing the road.

18.aid: support; help
Examples:
　　　　　The family lived on government aid for two years.
　　　　　A dictionary is an important aid in learning a new language.

19.set out: begin a course of action
Examples:
　　　　　He set out to break the world record.
　　　　　He set out to cut the grass, but he finished up talking to the neighbor over the garden wall.

20.sustain: (enable to) keep up, maintain
Examples:
　　　　　They had nothing to sustain them all day except two cups of coffee.
　　　　　The teacher tried hard to sustain the children’s interest in learning English.

21.at a time: one (two etc.) on each occasion; separately
Examples:
　　　　　He took the stairs two at a time.
　　　　　I’m away a couple of weeks at a time.

22.turn to: shift to
Examples:
　　　　　After he left the university, he became a teacher, but later he turned to journalism.
　　　　　In a time of grief, it often helps to turn to some new activity.

23.despite: in spite of
Examples:
　　　　　He came to the meeting despite his illness.
　　　　　Despite a shortage of steel, industrial output has increased by five percent.